Sound-absorbing cotton fixing structure

Abstract

The utility model relates to the technical field of automobile internal structures, and discloses a sound-absorbing cotton fixing structure which comprises a plastic part body, a base is integrally formed on the plastic part body, a binding face used for being matched with sound-absorbing cotton is arranged at the top end, away from the plastic part body, of the base, and a draft groove extending into the base is formed in the binding face. A blocking part is integrally formed on one side of the top end of the base and inclines towards the position above the die drawing groove, and a clamping space used for clamping sound-absorbing cotton is formed between the blocking part and the top end of the base. According to the sound-absorbing cotton fixing structure, the base and the obliquely-arranged blocking part structure are arranged, forming is convenient, the sound-absorbing cotton can be conveniently and stably installed and fixed, and the problems that in the prior art, a sound-absorbing cotton fixing structure is large in forming difficulty and inconvenient to fix are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile internal structures, in particular to a sound-absorbing cotton fixing structure. Background Art

[0002] In order to improve the aesthetics and comfort of the car interior, sound-absorbing cotton is usually installed on the outer wall of the body parts facing the interior of the car, and the sound-absorbing cotton is used to absorb sound and reduce noise, thereby making the interior environment more comfortable. At present, there are various ways to install sound-absorbing cotton, among which the common methods include bonding, welding and hanging. Bonding is to use viscose to stick the sound-absorbing cotton to the outer wall of the part. Although the operation is convenient, the viscose has an odor and is easy to fall off after sticking; the welding method is to use a welding gun to weld the sound-absorbing cotton to the plastic body. Although the sound-absorbing cotton can be firmly fixed, a burnt smell will be generated during the welding process and remain in the car body, affecting the comfort of vehicle use; the hanging method is to fix multiple hooks on the plastic body, and then hang the sound-absorbing cotton on the hooks. This method has a simple structure and is easy to install the sound-absorbing cotton, so it is widely used for the installation and fixation of sound-absorbing cotton.

[0003] Although the hooks provided in the prior art can stably fix the sound-absorbing cotton, there are still problems in actual application: although the existing hook structure can hang the sound-absorbing cotton, the hook's hanging gap is small, which makes it inconvenient to operate when hanging the sound-absorbing cotton; at the same time, since the hooks in the prior art are generally integrally molded on the plastic body by injection molding, the hook's hanging gap is small, and the hook's hanging gap generally needs to be molded using a side core pulling method, which makes the casting of the hook difficult; in addition, since the plastic body is generally a special-shaped structure, the location of the hook may not be a flat structure, resulting in poor flatness of the sound-absorbing cotton after it is hung on the hook, affecting the flatness of the sound-absorbing cotton installation and fixation. Therefore, it is necessary to improve the structure used to install and fix the sound-absorbing cotton in the prior art to reduce the molding difficulty of the hook structure and improve the operability of the sound-absorbing cotton installation and fixation. Utility Model Content

[0004] The utility model aims to provide a sound-absorbing cotton fixing structure to solve the problems in the prior art that the sound-absorbing cotton fixing structure is difficult to form and the fixing operation is inconvenient.

[0005] In order to solve the above problems, the utility model adopts the following technical solutions: a sound-absorbing cotton fixing structure, including a plastic body, a base integrally formed on the plastic body, a fitting surface for cooperating with the sound-absorbing cotton is provided at the top of the base away from the plastic body, a draft groove extending into the base is provided on the fitting surface, a blocking part is integrally formed on one side of the top of the base, the blocking part is inclined upwardly from the draft groove, and a clamping space for clamping the sound-absorbing cotton is formed between the blocking part and the top of the base.

[0006] The principle and beneficial effects of this solution are as follows: in this application, by integrally forming a base on the plastic body and providing a fitting surface on the top of the base away from one end of the plastic body, when the sound-absorbing quilt is installed and fixed, the fitting surface and the sound-absorbing cotton fit each other, making the sound-absorbing cotton more flat after installation and fixation. After the sound-absorbing cotton is installed and fixed, the position where the sound-absorbing cotton quilt is clamped is prone to wrinkles due to concentrated force. Therefore, the fitting surface provided on the base in this application can play an auxiliary flattening role for the sound-absorbing cotton in this position range, thereby making the installation and fixation effect of the sound-absorbing cotton better.

[0007] At the same time, the present application provides a draft groove on the base, and an integrally formed blocking portion is formed on one side of the top of the base, tilted upwardly toward the draft groove. During use, a snap-fitting space is formed between the blocking portion and the base. During the process of securing the sound-absorbing cotton, the snap-fitting hole on the sound-absorbing cotton only needs to be snapped into the snap-fitting space, making the snap-fitting and securing of the sound-absorbing cotton very simple. In addition, due to the provision of the draft groove and the tilted setting of the blocking portion, during the molding process of the blocking portion, the side core-pulling mold in the prior art can be pulled out of the draft groove along the tilted angle of the blocking portion, making the demolding process simple and stable, and effectively reducing the difficulty of injection molding the blocking portion.

[0008] Preferably, as an improvement, a structural reinforcement portion is provided on the side of the blocking portion facing away from the draft groove.

[0009] In this solution, a structural reinforcement part is provided on the side of the blocking part away from the demolding groove, and the structural reinforcement part is used to strengthen the overall structural strength of the blocking part. Not only will it not cause obstruction to the demolding process, but it can also effectively protect the blocking part and reduce the risk of deformation and damage of the blocking part during the demolding process. At the same time, when the sound-absorbing cotton is clamped and fixed in the clamping space between the blocking part and the base, the structural reinforcement part plays a structural reinforcement role on the blocking part, so that the blocking part can clamp and fix the sound-absorbing cotton more firmly, thereby improving the stability of the sound-absorbing cotton after installation and fixation.

[0010] Preferably, as an improvement, the structural reinforcement portion includes a reinforcement rib integrally formed on the blocking portion, and the end portion of the reinforcement rib is integrally formed with the plastic component body.

[0011] In this solution, the structural reinforcement part is a reinforcing rib. The reinforcing rib has a simple structure and is easy to form. It can effectively play a structural reinforcement role on the blocking part. At the same time, the end of the reinforcing rib is also integrally formed with the plastic part body, so that the reinforcing rib not only strengthens the structure of the blocking part itself, but also connects the blocking part and the plastic part body as one, further improving the structural stability of the blocking part, thereby achieving a better stabilization effect on the sound-absorbing cotton.

[0012] Preferably, as an improvement, there are multiple reinforcing ribs, and the multiple reinforcing ribs are arranged at intervals along the width direction of the blocking portion.

[0013] In this solution, multiple reinforcing ribs are provided to further enhance the reinforcing effect of the reinforcing ribs.

[0014] Preferably, as an improvement, the blocking portion includes a first inclined section and a second inclined section, the first inclined section is located between the base and the second inclined section, the inclined angle between the first inclined section and the fitting surface is θ, and the inclined angle between the second inclined section and the fitting surface is α, α<θ.

[0015] In this solution, the blocking portion includes a first inclined section and a second inclined section, and the first inclined section is located between the base and the second inclined section. When in use, after the sound-absorbing cotton is hung on the blocking portion, the sound-absorbing cotton itself has a certain thickness, so that the first inclined section cooperates with the hole wall of the hanging hole opened on the sound-absorbing cotton, and the inclination angle between the second inclined section and the fitting surface is smaller than the inclination angle between the first inclined section and the fitting surface, that is, the greater the inclination amplitude of the second inclined section relative to the fitting surface, the second inclined section can be used to limit the fixed sound-absorbing cotton, thereby reducing the risk of the sound-absorbing cotton falling off from the blocking portion.

[0016] Preferably, as an improvement, the thickness of the first inclined section is equal to the thickness of the second inclined section.

[0017] In this solution, the thickness of the first inclined section and the second inclined section are equal, so that the blocking portion can be better formed during the integral injection molding, and the structural strength of each part is consistent.

[0018] Preferably, as an improvement, the thickness of the first inclined section is greater than or equal to 1.5 mm.

[0019] In this solution, the thickness of the first inclined section (the thickness of the second inclined section is equal to the thickness of the first inclined section) is set to be greater than or equal to 1.5 mm, so that the blocking portion has sufficient strength to firmly fix the sound-absorbing cotton.

[0020] Preferably, as an improvement, the distance between the top end of the first inclined section and the fitting surface is greater than or equal to the thickness of the sound-absorbing cotton.

[0021] In this solution, the distance between the top of the first inclined section and the fitting surface is set to be greater than or equal to the thickness of the sound-absorbing cotton, so that after the sound-absorbing cotton is installed and fixed, the top of the second inclined section is prevented from squeezing the exposed side of the sound-absorbing cotton, which is conducive to ensuring the flatness of the sound-absorbing cotton after installation and fixation; of course, outside of this solution, for example, in order to focus on more firmly fixing the sound-absorbing cotton, the distance between the top of the first inclined section and the fitting surface can also be set to be less than or equal to the thickness of the sound-absorbing cotton.

[0022] Preferably, as an improvement, the distance between the top end of the second inclined section and the fitting surface is greater than or equal to 8 mm.

[0023] In this solution, the distance between the top of the second inclined section and the fitting surface is set to be greater than or equal to 8 mm, so that the distance between the top of the second inclined section and the fitting surface is sufficient. Not only can the side core pulling be easily completed during the injection molding process of the blocking part, but the blocking part can also have a larger "opening space", so that the sound-absorbing cotton can be more easily clipped into the clipping space.

[0024] Preferably, as an improvement, the end of the second inclined section away from the first inclined section is provided with a rounded corner.

[0025] In this solution, a rounded corner is provided at one end of the second inclined section away from the first inclined section, so that the snap-in hole on the sound-absorbing cotton can be snapped into the snap-in gap more conveniently and easily, thereby improving the operability of installing and fixing the sound-absorbing cotton. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of Example 1 of the present utility model.

[0027] Figure 2 for Figure 1 Partial cross-sectional view of the sound-absorbing cotton fixing structure at position A in the middle.

[0028] Figure 3 for Figure 1 Partial cross-sectional view of the sound-absorbing cotton fixing structure at position A in the middle and the sound-absorbing cotton after being fixed.

[0029] Figure 4 for Figure 1 Partial cross-sectional view of the sound-absorbing cotton fixing structure at position B.

[0030] Figure 5 The same as in the second embodiment of the present invention Figure 1 Partial cross-sectional view of the sound-absorbing cotton fixing structure at position A in the middle. DETAILED DESCRIPTION

[0031] The following is further described in detail through specific implementation methods:

[0032] The reference numerals in the drawings of the specification include: sound-absorbing cotton 1, plastic part body 2, base 3, fitting surface 301, draft groove 4, first inclined section 5, second inclined section 6, fillet 601, and reinforcing rib 7.

[0033] Example 1

[0034] This embodiment is as shown in the attached Figure 1 and Figure 2As shown: A sound-absorbing cotton fixing structure is used to fix the sound-absorbing cotton 1 in the car body in the prior art, including a plastic body 2, with a base 3 integrally formed on the plastic body 2. The number of bases 3 is at least three, and the top of each base 3 away from the plastic body 2 is provided with a fitting surface 301 for fitting with the sound-absorbing cotton 1. After the sound-absorbing cotton 1 is installed and fixed, the fitting surface 301 can provide planar support for the sound-absorbing cotton 1, so that the sound-absorbing cotton 1 is in a flat state after being fixed. Of course, since some parts of the plastic body 2 have good flatness, in actual application, the plastic body 2 with good flatness can itself be used as the base 3, for example, for Figure 4 The position shown can be understood as the top surface of the base 3 being flush with or slightly higher than the end surface of the plastic body 2. The end surface of the plastic body 2 can be regarded as the fitting surface 301. Figure 2 A base 3 with a significant height is provided (shown in the figure), which will not be described in detail here.

[0035] Combine Figure 2 and Figure 3 The top of the base 3 is integrally formed with a draft groove 4 extending into the base 3. The draft groove 4 is a square structure, which makes the wall thickness of the four sides of the base 3 equal, so that the base 3 can be injection molded more stably and reduces defects in the injection molding process. At the same time, a blocking portion is integrally formed on one side of the top of the base 3 by injection molding. The blocking portion is inclined upward from the draft groove 4. A clamping space for clamping the sound-absorbing cotton 1 is formed between the blocking portion and the top of the base 3. In this embodiment, the blocking portions on all bases 3 are arranged to face outward from the sound-absorbing cotton 1. Therefore, after the sound-absorbing cotton 1 is clamped into the clamping space, the multiple blocking portions can apply a clamping force to the sound-absorbing cotton 1 from multiple directions, so that the sound-absorbing cotton 1 can be firmly attached to the plastic body 2 after installation.

[0036] Specifically, such as Figure 3 As shown, the blocking portion in this embodiment includes a first inclined section 5 and a second inclined section 6 with a smooth transition, wherein the first inclined section 5 is located between the base 3 and the second inclined section 6, and the thickness value of the first inclined section 5 is equal to the thickness value of the second inclined section 6. The thickness values ​​of the first inclined section 5 and the second inclined section 6 are both greater than or equal to 1.5 mm, and in this embodiment, preferably 2.5 mm, so that the first inclined section 5 and the second inclined section 6 have good strength, and the molding of the first inclined section 5 and the second inclined section 6 is more stable and the strength is consistent.

[0037] At the same time, in this embodiment, the inclination angle between the first inclined section 5 and the fitting surface 301 is θ, and the inclination angle between the second inclined section 6 and the fitting surface 301 is α, α<θ, so that the second inclined section 6 has a larger inclination than the first inclined section 5, so that the second inclined section 6 can play an auxiliary "pressing" role on the sound-absorbing cotton 1 that has been installed in the snap-fit ​​gap, reducing the occurrence of the sound-absorbing cotton 1 slipping out of the snap-fit ​​gap, so that the sound-absorbing cotton 1 is more firmly connected to the plastic body 2 during use. In addition, the distance D between the top of the first inclined section 5 and the fitting surface 301 is greater than or equal to the thickness of the sound-absorbing cotton 1, so that after the sound-absorbing cotton 1 is installed and fixed, the first inclined section 5 can play a good blocking and limiting role on the sound-absorbing cotton 1; the second inclined section 6 is provided with a rounded corner 601 away from the top of the first inclined section 5, and the distance H between the top of the second inclined section 6 and the fitting surface 301 is greater than or equal to 8 mm, and this embodiment is preferably 8.5 mm, so that the "opening" between the second inclined section 6 and the fitting surface 301 is larger, which is not only conducive to the demolding of the core pulling inside the forming draft groove 4, but also can conveniently snap the snapping hole on the sound-absorbing cotton 1 into the snapping gap, making the installation and fixation of the sound-absorbing cotton 1 more convenient. Specific implementation method:

[0039] In this embodiment, since the base 3 is provided with a draft groove 4, and the first inclined section 5 and the second inclined section 6 of the blocking portion are both inclined relative to the fitting surface 301, the side core-pulling mechanism used to form the first inclined section 5 and the second inclined section 6 can be easily demolded, and the injection molding difficulty and molding cost of the blocking portion are lower. At the same time, in this embodiment, multiple bases 3 are provided. When installing and fixing the sound-absorbing cotton 1, it is only necessary to provide a snap-in hole on the sound-absorbing cotton 1 and then insert the blocking portion into the snap-in hole. The multiple blocking portions on the multiple bases 3 tighten and fix the sound-absorbing cotton 1 from different angles, making the installation and fixing process of the sound-absorbing cotton 1 very convenient. After the sound-absorbing cotton 1 is installed and fixed, the second inclined section 6 can play an auxiliary "pressing" role on the sound-absorbing cotton 1, effectively reducing the possibility of the sound-absorbing cotton 1 slipping out of the snap-in gap and ensuring the stability of the sound-absorbing cotton 1 after installation and fixation.

[0040] Example 2

[0041] The difference between the second embodiment and the first embodiment is that: Figure 5 As shown, in this embodiment, a structural reinforcement portion is provided on the side of the blocking portion away from the draft groove 4. The structural reinforcement portion is a reinforcing rib 7 integrally formed on the outer side of the first inclined section 5 and the second inclined section 6 away from the draft groove 4. The bottom end of the reinforcing rib 7 is also integrally formed with the plastic part body 2. In this embodiment, there are multiple reinforcing ribs 7, and the multiple reinforcing ribs 7 are arranged at intervals along the width direction of the blocking portion. Figure 5There are three middle reinforcing ribs 7, and the length of the reinforcing ribs 7 close to the side of the blocking part is greater than or equal to the length of the middle reinforcing rib 7. The structure of the blocking part is reinforced by the reinforcing ribs 7, so that the blocking part provides a stable fixing force for the installation and fixation process of the sound-absorbing cotton 1, further improving the stability of the installation and fixation of the sound-absorbing cotton 1.

[0042] The above description is merely an embodiment of the present invention, and the commonly known specific technical solutions and / or features of the solution are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be considered as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed in this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A sound-absorbing cotton fixing structure, comprising a plastic body, characterized in that: A base is integrally formed on the plastic body, and a fitting surface for cooperating with the sound-absorbing cotton is provided at the top of the base away from the plastic body. A draft groove extending into the base is provided on the fitting surface, and a blocking portion is integrally formed on one side of the top of the base. The blocking portion is inclined upward from the draft groove, and a clamping space for clamping the sound-absorbing cotton is formed between the blocking portion and the top of the base.

2. A sound-absorbing cotton fixing structure according to claim 1, characterized in that: A structural reinforcement portion is provided on a side of the blocking portion facing away from the die draft groove.

3. The sound-absorbing cotton fixing structure according to claim 2, characterized in that: The structural reinforcement portion includes a reinforcement rib integrally formed on the blocking portion, and the end portion of the reinforcement rib is integrally formed with the plastic component body.

4. The sound-absorbing cotton fixing structure according to claim 3, characterized in that: There are multiple reinforcing ribs, and the multiple reinforcing ribs are arranged at intervals along the width direction of the blocking portion.

5. A sound-absorbing cotton fixing structure according to any one of claims 1 to 4, characterized in that: The blocking portion includes a first inclined section and a second inclined section. The first inclined section is located between the base and the second inclined section. The inclined angle between the first inclined section and the fitting surface is θ, and the inclined angle between the second inclined section and the fitting surface is α, α<θ.

6. The sound-absorbing cotton fixing structure according to claim 5, characterized in that: The thickness of the first inclined section is equal to the thickness of the second inclined section.

7. The sound-absorbing cotton fixing structure according to claim 6, characterized in that: The thickness of the first inclined section is greater than or equal to 1.5 mm.

8. The sound-absorbing cotton fixing structure according to claim 5, characterized in that: The distance between the top of the first inclined section and the fitting surface is greater than or equal to the thickness of the sound-absorbing cotton.

9. The sound-absorbing cotton fixing structure according to claim 5, characterized in that: The distance between the top end of the second inclined section and the fitting surface is greater than or equal to 8 mm.

10. The sound-absorbing cotton fixing structure according to claim 5, characterized in that: An end of the second inclined section away from the first inclined section is provided with a rounded corner.

Images